feat: add user notification email

[Reshzera]

Summary by CodeRabbit

• New Features

  • Enhanced email verification process with clearer warnings and instructions for users.
  • New EmailSentCard component to notify users when a verification code is sent.
  • Added functionalities for checking email availability and sending confirmation codes.
  • Conditional rendering for email verification prompts in various components.
  • Introduced VerifyInputButton to visually indicate email verification status.

• Bug Fixes

  • Improved error handling and user feedback related to email verification issues.

• Documentation

  • Updated localization files to include new labels and error messages.

• Style

  • Modified header behavior to be sticky for better accessibility during scrolling.

• Chores

  • Streamlined component logic for improved maintainability and performance across the application.